private UInt32 ComputeSum(MapperProgram program, UInt32 row_min, UInt32 row_max, UInt32 answer_units,
UInt32 answer_min, UInt32 answer_max)
{
UInt32 clipped_scaled_sum = 0;
UInt32 total_remainder = 0;
foreach (DiffPrivRow row in rows)
{
UInt32 row_value = program.Run(row.data);
UInt32 clipped_value = ClipWord32(row_value, row_min, row_max);
UInt32 scaled_value = clipped_value / answer_units;
UInt32 scaling_remainder = clipped_value % answer_units;
clipped_scaled_sum = SaturatingAdd(clipped_scaled_sum, scaled_value);
total_remainder = total_remainder + scaling_remainder;
if (total_remainder >= answer_units)
{
clipped_scaled_sum = SaturatingAdd(clipped_scaled_sum, 1);
total_remainder -= answer_units;
}
}
UInt32 extra = (UInt32)(total_remainder * 2 >= answer_units ? 1 : 0);
clipped_scaled_sum = SaturatingAdd(clipped_scaled_sum, extra);
return(ClipWord32(clipped_scaled_sum, answer_min, answer_max));
}
private UInt32 ComputeSum (MapperProgram program, UInt32 row_min, UInt32 row_max, UInt32 answer_units,
UInt32 answer_min, UInt32 answer_max)
{
UInt32 clipped_scaled_sum = 0;
UInt32 total_remainder = 0;
foreach (DiffPrivRow row in rows)
{
UInt32 row_value = program.Run(row.data);
UInt32 clipped_value = ClipWord32(row_value, row_min, row_max);
UInt32 scaled_value = clipped_value / answer_units;
UInt32 scaling_remainder = clipped_value % answer_units;
clipped_scaled_sum = SaturatingAdd(clipped_scaled_sum, scaled_value);
total_remainder = total_remainder + scaling_remainder;
if (total_remainder >= answer_units)
{
clipped_scaled_sum = SaturatingAdd(clipped_scaled_sum, 1);
total_remainder -= answer_units;
}
}
UInt32 extra = (UInt32)(total_remainder * 2 >= answer_units ? 1 : 0);
clipped_scaled_sum = SaturatingAdd(clipped_scaled_sum, extra);
return ClipWord32(clipped_scaled_sum, answer_min, answer_max);
}
